Linux 适用命令
We can check summary of a directory by issuing
du -sh <directory>
check a directory size.
du -lh
https://www.ibm.com/developerworks/community/blogs/58e72888-6340-46ac-b488-d31aa4058e9c/entry/estimate_file_space_usage_with_du_command_in_linux62?lang=en